how to implement retrofit library with GSON and RxJava in android

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Retrofit can be used with GSON and RxJava to simplify network requests in an Android project. Here is how you can implement Retrofit with GSON and RxJava:


Add the Retrofit, GSON, and RxJava dependencies to your app-level build.gradle file:

python

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implementation 'com.squareup.retrofit2:retrofit:2.9.0'

implementation 'com.squareup.retrofit2:converter-gson:2.9.0'

implementation 'io.reactivex.rxjava2:rxjava:2.2.19'

implementation 'com.squareup.retrofit2:adapter-rxjava2:2.9.0'

Create an interface to define the endpoints you want to access using Retrofit:

kotlin

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public interface APIInterface {

  @GET("users")

  Observable<List<User>> getUsers();

}

Create a Retrofit instance and configure it with a base URL and GSON converter:

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Retrofit retrofit = new Retrofit.Builder()

  .baseUrl("https://api.example.com/")

  .addConverterFactory(GsonConverterFactory.create())

  .addCallAdapterFactory(RxJava2CallAdapterFactory.create())

  .build();

Create an implementation of the APIInterface using the Retrofit instance:


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APIInterface api = retrofit.create(APIInterface.class);

Make a network request using the API and subscribe to the observable:

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api.getUsers()

  .subscribeOn(Schedulers.io())

  .observeOn(AndroidSchedulers.mainThread())

  .subscribe(new Observer<List<User>>() {

    @Override

    public void onSubscribe(Disposable d) {

      // Handle subscription

    }


    @Override

    public void onNext(List<User> users) {

      // Handle response

    }


    @Override

    public void onError(Throwable e) {

      // Handle error

    }


    @Override

    public void onComplete() {

      // Handle completion

    }

  });

This is just a basic example, you can learn more about Retrofit and RxJava from their respective official documentation:


Retrofit: https://square.github.io/retrofit/

RxJava: https://github.com/ReactiveX/RxJava

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